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Development of a Nondestructive Test Device for Friction Rock Supports.

Authors
Lusignea-RW; Felleman-J; Kirby-K
Source
NTIS: PB/83-257519 :135 pages
Link
NIOSHTIC No.
10003082
Abstract
A device was developed for nondestructive testing of the holding power of split-tube friction rock supports. The device operates by measuring the amount of decrease in internal volume when the support is forced into the drilled hole. The pullout force, or slip load, is a function of the decrease in volume. The device gives readouts of the average internal diameter and predicted pullout force for the support. Laboratory and field tests showed excellent repeatability and good correlation between predicted and actual pullout force. The device is hand-operated, lightweight, and can be used on any friction support.
Publication Date
19830101
Document Type
CP; Final Contract Report;
Fiscal Year
1983
NTIS Accession No.
PB83-257519
NTIS Price
A08
Identifying No.
OFR 165-83
NIOSH Division
SRC;
Source Name
NTIS: PB/83-257519
Performing Organization
Foster-Miller, Inc.
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division